openpgp-api — client library for the OpenPGP provider API (OpenKeychain).

Vendored from the Thunderbird for Android repository:
  https://github.com/thunderbird/thunderbird-android
  path:   plugins/openpgp-api-lib/openpgp-api
  commit: c2859b12f967e782ab71ea2820ecf0a88e053176 (2026-06-09)

Original project: https://github.com/open-keychain/openpgp-api
Copyright the OpenKeychain / openpgp-api authors.
Licensed under the Apache License, Version 2.0 (see LICENSE).

Local modifications for Sterna Mail:
  - Replaced the Thunderbird logging shim (net.thunderbird.core.logging.legacy.Log)
    with android.util.Log in OpenPgpApi.java and ParcelFileDescriptorUtil.java.
  - Dropped UI/lifecycle helpers not used by Sterna: OpenPgpApiManager.java,
    OpenPgpKeyPreference.java, OpenPgpIntentStarter.kt, the res/ tree, and the
    unused IOpenPgpService.aidl (v1 interface; Sterna binds IOpenPgpService2).
